Microorganisms: Mold, Yeast, Protozoa, and Algae Identification

Rhizopus

Mold with round sporangia on long hyphae.

Penicillium

Mold with brush-like conidial structures.

Aspergillus

Mold with round, dandelion-shaped conidial heads.

Phycomyces

Mold with long stalks and round sporangia.

Rhodotorula rubra

Pigmented yeast that forms pink or red colonies.

Candida albicans

Yeast that forms buds and elongated pseudohyphae.

Saccharomyces cerevisiae

Budding yeast used in fermentation.

Schizosaccharomyces

Yeast that divides by splitting across the middle.

Trigonopsis

Yeast with a triangular or three-armed shape.

Amoeba proteus

Changing blob-shaped protozoan that moves with pseudopodia.

Arcella

Amoeba surrounded by a shell or test.

Trypanosoma

Thin, wavy flagellate often found among red blood cells.

Trichomonas vaginalis

Flagellated protozoan that causes a reproductive tract infection.

Giardia

Pear-shaped protozoan with two nuclei and several flagella.

Euglena gracilis

Green, spindle-shaped flagellate with chloroplasts.

Hydrodictyon

Green alga that forms a honeycomb or fishing-net structure.

Oscillatoria

Photosynthetic cyanobacterium forming long filaments.

Spirogyra

Green alga with spiral-shaped chloroplasts.

Chlorella

Unicellular green alga made of tiny round cells.